Alarm mechanism for pneumatic-tired wheels.



M. F. STADTMULLER. ALARM MECHANISM FOR PNEUMATIC TIRED WHEELS APPLICATION FILED OUT. 7,1912.

Patented Apr. 21, 1914" incense.

- UNITED" sTAr s PATENT OFFICE.

MAX r. smnrmnrra, 'or roar nonen, Iowa.

ALARM unonmsm: roe rnnmarro-m'nn Specification of Letter's Tatentl Patented Apr. 21,1914- Application filed umber-7, 1912. Serial No. 724,404.

' To all whom it may concern:

Be it known thatI, MAXF. 'STADTMU LER, citizen of the United States, residing at Fort Dodge, in the county of Webster and State of Iowa, have invented certain new and useful Improvements in Alarm Mechanismfor Pneumatic-Tired Wheels, of.v which the following is a specification.

This invention relates to an improvement in attachments for neumatic tired wheels which when the tire as become deflated opwhich the crates a signal on the vehicle to wheel is-attached.

The primary object of the invention 1 is-to rovide a construction which may be carried by the wheel and which will be acted upon by a deflated tire to sound an alarm.

.A further object of the invention is to provide a construction in which the tire when deflated will instantly operate the.

alarm and which may be readily reset after the tirehas been inflated.

A 'further object of-the invention is to provide means carried by the wheels of a vehicle'which will when a tire is deflated operate means supported on the car to sound an alarm disposed on the dash board or at any point convenient to the operator, an alarm actuating mechanism which is carried by one wheel acting'independently of the alarm actuating mechanisms on the'other wheels.

' In the drawingsz-Figure l is a rear elevation illustrating a portion of a pneumatic tired vehicle, one 0 the tires being shown as deflated, the tripping mechanism of the wheel on which said tireis positioned being shown in position to actuate the alarm;'Fig.' 2'is a diagramma'tical view showing the .arrangen ient of the alarm sounding-mechanism; Fig. 3 is a vertical section taken through the trip mechanism; Fig. 4 is a disassembled perspective .of the trip mechanism, the trip being omitted; Fig. 5 is a de- 1 tail view of the hingedly supported terminal of the trip; Fig. 6 is a new showing a modified form of trip actuating mechanism.

In the drawings 10 designates a bail or yoke which is disposed to embrace the spoke of a pneumatic -tired wheel, said .bail being stormed with the threaded terminals 11 which extend through the apertures 12 1 in the plate13, nuts lbeingv threaded on the. terminals 11 to hold the bail and plate-in j contact with the spoke. A'spoke engaging bar 15 is secured to the.plate, said spoke engaging b ar-being formed with the concaved extension 16 the spoke-being received by the conca'ved portion of said extension.v The threaded terminals 11 of the bail extend through the threaded apertures 15, formed in thefterminalsof-the spoke engaging bar,

the bail supporting the bar on theplate 13.

It Wlll be-noted that when the nuts 14 are t1ghtened, the bail 10 will be drawn into contact with .the spoke, forcing the same within the concaved portion of the extension 16. The plate '13 isthus supported on the spoke, the "plate being forme with an extension 17 which contacts with the spoke forming a contacting surface which is disposed at right angles to the spoke engaging bar 15. A plurality of lugs 18 have their ofl set terminals 19 secured to the plate 13 adjacent its-upper edge. These lugs or cars are provided w1th apertures 20 adjacent their terminals and apertures 21 intermediate their ends.

. substantially L-shaped latch member 22 is pivotally supported by the transverse pin 23 which extends within the a ertures formed adjacent the terminals 'of t e ears. Th'1slatch member22 comprises a lon arm 24, the terminal 25 of which is curve ,and

the short arm 26. One terminal of the trip member 25 1s b1furcated,-the bifurcations 28 i of said terminal receiving the ears 18; screws 28 passing through the looped terminals 29 of the bifurcations pivotally supporting the trip member on the ears at a point adjacent the plate. The trip member is provided with. the adjustable catch 31, a screw 32- passing through said catch, said screw passmg through theslot33 which is formed in the member 25-, the screw being provided w1th .the head 34 which is brought in binding contact with the body portion of the- The terminal 35 of the catch is terminal being off-set and disposed to contact with the under face of the catch 35',

the spring being received by the slot 40 formed in the trip member. Thus the spi'mg is maintained in contact with the trip member, the slot forming a guide for the spring, maintaining it at all times in contact with the catch.

It will be noted that the spring will normally maintain the trip member 25 at right angles with the plate 13. 'lhe latch member 20 when the tire is inflated is'moved on its pivot until its short arm 26 is received within the beveled portion 36 of the catch. The

Y trip is then depressed, the lug or enlargement 37 supporting the short arm 26 a ainst .IIlQVement, the combined action of the spring 38 and said enlargement maintaining the latch member in set position. The member 20 is thus disposed at a point adjacent the tire, being out of contact with the tire when. it is inflated. It will be seen that when the tire becomes deflated itwill flatten out, its edge portion contacting with the latch member '20, bringing the short arm 26 of the latch member'out of contact with the catch, The spring 38 then causes the trip member 25 to assume a position at right angles to the plate 13.

A vertically disposed supporting bracket.

all is secured toa convenientportion of the runnmg gear, the present drawings showing the same as supported by the ellipticalsprings of the vehicle. A shaft 42 is supported for a rocking movement by the brackets 41, there being an arm 43 supported at bothterminals of the shaft 42, said arm a3 being normally vertically disposed and in the path of the trip member 25 when thesame has been moved to a position at right, angles to the plate 13. A link 44 is arranged on the shaft 42, said link being connected bymeans of the wire 45 to the bell crank lever 4,6. This bell crank lever 46 is 'piv0ta11y supported adjacent the front of the rocking the shaft 12 thus transmitting move-" ment to the bell crank 46 by means of the link l4: and wire 45, sounding the alarm. The SOuhdin of the alarm will be continued until the w eel ceases "to rotate, the trip member being moved to assume; its normal set position after .the tire has been inflated.

The many advantages ofa construction of this character will be clearly apparent as it will be seen that it provides means for advising the occupant of the vehicle that one of the tires is flattened and continues to sound the alarm as long as the vehicle is in motion.

- It will be apparent that a mechanism member fl6 is pivotally supported by theplate d7, said latch member being connect- 7 ed to saidplate by the spring 48 one terminalof whlch ls-connected to the latch mem-' her at the point 49' and the other to the plate at the point 50. The trip 51 is pivotally supported by the cars 52 of the plate, a co1l spring 53 normally extending the trip at right angles to the plate. The terminal 54. of the latch member 46 engages the trip at the point 55, maintaining the same in a position substantially parallel with the plate against the tension of the spring 53. It will be noted by this construction that when the tire is deflated the same will contact with the latch member 46, bringing it out of contact with the trip, which is then disposed at right angles to the plate by means of the spring 53. The many advantages of this construction will be clearly apparent, as it will be noted that the latch member and trip are both under spring tension and respond readily to the action of the tire.

It will be noted that this construction is such as may be easily and economically manufactured and that the various parts may be readily assembled.

Having described the invention, what I claim is:

1. A device of the class described comprising a plate supported by the spoke of a pneumatic tired wheel adjacent its rim, a yoke embracing the spoke, said yoke being formed with threaded terminals which extend through apertures in the plate, a bar supported on the plate by said yoke, said bar-being formed with a concaved enlargement, the spoke being received between said yoke and said bar, cars supported by the plate on its face remote from said bar, a latch member pivotally supported between said ears, a trip one terminal of which is bifurcated, the bifurcations of said terminal being pivotally supported on the outer face of said cars, a member supported by said Y trip and adjustable longitudinally of the same, the terminal of said member extending between the bifurcations of the trip in the path of said latch member, a spring supported by the plate and disposed to ex tend between the bifurcations of the trip to contact with the adjustablemember carried thereby, the said latch member being disposed to engage the adjustable member supported by the trip to maintain the trip substantially parallel with the plate, said trip when the latch member is released being disposed at right angles to the plate, and

' substantially L-shaped latch member pivotmeans actuated by the trip for sounding an alarm.

2. A device of the class described comprising a plate supported by the spoke of a pneumatic tired wheel adjacent its rim, said plate being provided with spaced arms, a

ally supported between said arms,'a trip pivotally supported 10 the arms, and means interposed between t e plate and trip for normally maintaining the latch member in ing a plate supported by the spoke of a.

pneumatic tired wheel adjacent its rim, arms carried by the plate, a member formed with extensions disposed at right angles to each Copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents,

other, one of which is more extensive than the other, a member pivotally supported between said arms, a resilient latch arranged on said member, and resilient means interposed between said latch and the plate for -maintaining the latch in contact with the less extensive arm. of the first-mentioned member, whereby the more extensive arm of said member will be disposed Where-the tiremay contact with the same when it' is deflated.

In testimony whereof I aflix my signature in presence of two witnesses. V

MAX F. STADTMULLER. 1 8.] Witnesses: I

HENRY TROsT, HENRY L, WEISS.

' Washington, D. G. 

